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* commit '36ef5369ee9b336febc2c270f8718cec4476cb85': Replace all CODEC_ID_* with AV_CODEC_ID_* lavc: add AV prefix to codec ids. Conflicts: doc/APIchanges doc/examples/decoding_encoding.c doc/examples/muxing.c ffmpeg.c ffprobe.c ffserver.c libavcodec/8svx.c libavcodec/avcodec.h libavcodec/dnxhd_parser.c libavcodec/dvdsubdec.c libavcodec/error_resilience.c libavcodec/h263dec.c libavcodec/libvorbisenc.c libavcodec/mjpeg_parser.c libavcodec/mjpegenc.c libavcodec/mpeg12.c libavcodec/mpeg4videodec.c libavcodec/mpegvideo.c libavcodec/mpegvideo_enc.c libavcodec/pcm.c libavcodec/r210dec.c libavcodec/utils.c libavcodec/v210dec.c libavcodec/version.h libavdevice/alsa-audio-dec.c libavdevice/bktr.c libavdevice/v4l2.c libavformat/asfdec.c libavformat/asfenc.c libavformat/avformat.h libavformat/avidec.c libavformat/caf.c libavformat/electronicarts.c libavformat/flacdec.c libavformat/flvdec.c libavformat/flvenc.c libavformat/framecrcenc.c libavformat/img2.c libavformat/img2dec.c libavformat/img2enc.c libavformat/ipmovie.c libavformat/isom.c libavformat/matroska.c libavformat/matroskadec.c libavformat/matroskaenc.c libavformat/mov.c libavformat/movenc.c libavformat/mp3dec.c libavformat/mpeg.c libavformat/mpegts.c libavformat/mxf.c libavformat/mxfdec.c libavformat/mxfenc.c libavformat/nsvdec.c libavformat/nut.c libavformat/oggenc.c libavformat/pmpdec.c libavformat/rawdec.c libavformat/rawenc.c libavformat/riff.c libavformat/sdp.c libavformat/utils.c libavformat/vocenc.c libavformat/wtv.c libavformat/xmv.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
119 lines
3.4 KiB
C
119 lines
3.4 KiB
C
/*
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* Chronomaster DFA Format Demuxer
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* Copyright (c) 2011 Konstantin Shishkov
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/intreadwrite.h"
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#include "avformat.h"
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#include "internal.h"
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static int dfa_probe(AVProbeData *p)
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{
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if (p->buf_size < 4 || AV_RL32(p->buf) != MKTAG('D', 'F', 'I', 'A'))
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return 0;
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return AVPROBE_SCORE_MAX;
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}
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static int dfa_read_header(AVFormatContext *s)
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{
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AVIOContext *pb = s->pb;
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AVStream *st;
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int frames;
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uint32_t mspf;
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if (avio_rl32(pb) != MKTAG('D', 'F', 'I', 'A')) {
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av_log(s, AV_LOG_ERROR, "Invalid magic for DFA\n");
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return AVERROR_INVALIDDATA;
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}
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avio_skip(pb, 2); // unused
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frames = avio_rl16(pb);
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st = avformat_new_stream(s, NULL);
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if (!st)
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return AVERROR(ENOMEM);
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st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
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st->codec->codec_id = AV_CODEC_ID_DFA;
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st->codec->width = avio_rl16(pb);
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st->codec->height = avio_rl16(pb);
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mspf = avio_rl32(pb);
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if (!mspf) {
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av_log(s, AV_LOG_WARNING, "Zero FPS reported, defaulting to 10\n");
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mspf = 100;
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}
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avpriv_set_pts_info(st, 24, mspf, 1000);
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avio_skip(pb, 128 - 16); // padding
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st->duration = frames;
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return 0;
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}
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static int dfa_read_packet(AVFormatContext *s, AVPacket *pkt)
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{
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AVIOContext *pb = s->pb;
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uint32_t frame_size;
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int ret, first = 1;
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if (pb->eof_reached)
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return AVERROR_EOF;
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if (av_get_packet(pb, pkt, 12) != 12)
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return AVERROR(EIO);
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while (!pb->eof_reached) {
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if (!first) {
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ret = av_append_packet(pb, pkt, 12);
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if (ret < 0) {
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av_free_packet(pkt);
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return ret;
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}
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} else
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first = 0;
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frame_size = AV_RL32(pkt->data + pkt->size - 8);
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if (frame_size > INT_MAX - 4) {
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av_log(s, AV_LOG_ERROR, "Too large chunk size: %d\n", frame_size);
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return AVERROR(EIO);
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}
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if (AV_RL32(pkt->data + pkt->size - 12) == MKTAG('E', 'O', 'F', 'R')) {
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if (frame_size) {
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av_log(s, AV_LOG_WARNING, "skipping %d bytes of end-of-frame marker chunk\n",
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frame_size);
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avio_skip(pb, frame_size);
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}
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return 0;
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}
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ret = av_append_packet(pb, pkt, frame_size);
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if (ret < 0) {
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av_free_packet(pkt);
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return ret;
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}
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}
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return 0;
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}
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AVInputFormat ff_dfa_demuxer = {
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.name = "dfa",
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.long_name = NULL_IF_CONFIG_SMALL("Chronomaster DFA"),
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.read_probe = dfa_probe,
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.read_header = dfa_read_header,
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.read_packet = dfa_read_packet,
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.flags = AVFMT_GENERIC_INDEX,
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};
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